In research published in the journal Nature Physics, scientists at CERN in Switzerland and Goethe University Frankfurt in Germany announced that they had isolated a resonant “ghost” that affects how particles behave inside the Super Proton Synchotron (SPS).
It’s a 3D shape that shifts over time, meaning it’s best measured in 4D. And the secret is the same reason you spill your coffee walking back to your desk, or super-bounce your friends off the trampoline.
The SPS is a ring that’s nearly four miles across, dating back to the 1970s. That sounds like ancient history, but the SPS has remained vital at CERN. In 2019, it received an upgraded “beam dump,” which is like the runaway truck ramp for the high-powered beams inside the SPS. So, when researchers noticed the ghost in the machine, so to speak, they knew it was important to map and understand for future work.
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